Disk harrow



W. C. DWYR DISK HARRow May 14, 1929.

Filed Jan. 23, 1928 Patented May 14, IQZSL UNITED sTA'rEs 1,712,815PATENT OFFICE.

WILLIAM C. DWYER, F `AUBURN, NEW YORK, ASSIGNOR TO INTERNATIONAL HAR?VESTER COMPANY, A CORPORATION OF NEW JERSEY.

` DISK HARROW.

Application llcd January 23, 1928. Serial No. 248,702.

This invention relates to `disk harrovvs and is in the nature of animprovement on a disk harrovv oit the structure described and claimed inassignees co-pending application by Robinson et al.7 Serial N o.154,049, tiled December 11, 1926.

The main object ot the invention is to eonstruct a disk barrow of thepivoted gang type so as to give a certain degree of tlcxibility to theindividual disk gangsto allovv them to contorm to* irregularities in theground surface. rlhis is accomplished through a novel manner otconnectnp` the disk gangs tothe hai-row frame, so that the gangs mayhave a certain range of vertical tilting movement at all horizontalangular adjustments thereof and in which such ver tical movement islimited by yieldable means.

This and other minor objects and advantages, Which Will be apparent tothose skilled in the art, are accomplished through the novelcombination' and details of construction hereinafter more particularlyde scribed and .illustrated in the accompany ingl drawings WhereimfFigure 1 is a plan view of a. portionot a pivoted gang harrovv embodyingthe invention;

Figure 2 is a sectional, front elevation of one ot' the gangs shown inFigure 1;

Figure 3 is an enlarged detail of a gang connection;

Figure 4 is an end view ot the structure` seen in Figure 3; and i Figure5 is a detail ot a pivot plate employed ior connecting the gangs to theframe.

In the present instance the invention is illustrated as embodied in a.`disk barrow fomprising a main frame formed ot an outer lll-shaped orarcuate frame bar 10, the arms ot which are connected by a transversebar l1, Which bars are secured to a pair o1 longitudinal bars 12 shownbroken otl in Figure l, and Which may ent-end forwardly to form thedratt tongue of the harrovv in' the usual manner. Angularly adjustabledisk gangs ,13 and 14C are located as usual under the main frame and inthis instance are pivoted at their inner ends to central points on themain frame, as at 15 and 16. Angling and straightening of these gangs isaccomplished through mechanism (not shown) on. the for Ward end ot thelongitudinal members 12,

to which the connecting bars 177 and 18 shown. 1n part in Figure 1 areconnected in. any suitable manner. The bars 17 and 1S are pivoted, as at19, to the respective disk i ent invention only in so far as it entersinto the novel combination and structure new to be described.

In the practice ot the prescnt'invention the inner end ot each disktrame `member 20 has fixed to it a projecting pivot plate shown indetail in Figure 5. The end et this plate is provided With an elongatedslotl 2G which receives a spacing sleeve or bushing` 27' carried onabolt forming the vertical pivot 15 or 16 of the disk gang. By provisionof the slot 26 in the pivot plate 25, a loose pivotal connection oit thedisk frame is obtained and provision is thus made for bot-h horizontaland vertical angular movement of the dislr gang and frame. At a pointspaced radially from the pivot l5 and preferably contiguous to themember 10 of the main `trame, the portion ot the ganoflfraine 20 whichprojects beyond the main `frame provided with a noval form of connectionwith said main frame menfiber. This connection j iire'terably consistsof a `braclmt or saddle piece 23 bolted or otherwise secured to theupper side oit the gang iframe member 20 at the connectingjr point olthe brace member 22. As best seen in Figures 3 and 1l, the braclretmember 23 is formed to straddle the brace member 22 and has uprightinner and outer portions or walls 29 and 30 extendingfrom a base orcrosspiece 28. The outer Wall 29 is provided at a central point With anupwardly extending pin 3l and the Wall 30` at each end has upwardlyextending parallel pins or lugs 32. The pins 31 and 32 serve retainersand guides for a connectingl plate 33 which has a main horizontalportion seated on the Walls 29 and 30 between the pins 32 and receivingthe pins 81 in a suitable aperture provided in the horizontal porllOVprovide an offset portion 34 which overhangs the arcuate frame memberlO ol the main frame. The connecting plate 33 isyieldably held on thebracket 28 and in position between its guides or retainers by means of avertical standard vor bolt 35 which passes through the horizontalVportion ot' the bracket member 28 and through the gang framemember 20,serving incidentally as the connectingor pivot bolt for the brace 22.

The bolt extends upwardly through a suitable aperture in the plate 33,and carries a spiral pressure spring 36, which engages the upper surfaceof the connecting plate and is held in place on the bolt 35 as by meansot a nut and washer 37.

The connection between the gang and main frames just described permitsordinary horizontal angular Aadjustment of the disk gang vrames'and inaddition to that permits each gang frame to rise and fall with respectto the main trame, as illustrated in Figure 2. Preferably, theoverhanging portion 34 of the plate 33 is normally slightly spaced fromthe main frame member 10, as seen in Figure 3, to allow a certain degreeof free motion. -When this range of movement is exceeded, the ollfsetextension 34 will engage the upper edge of the main frame Ymember l0,causing the plate 33 to rise in its seat on bracket 23 and compress thespring 36, gradually arresting the downward movement of the gang frame.As the connecting plate 33 approximately fol lows the curve of the framemember 10 whenthe gang frame is angled, the connection is effective atall angular adjustments of the disk gang.

It will accordingly be seen that the above construction exemplities adisk gang mount ing in which provision for independent vertical tiltingmovement ot' each disk gang vis made, and in which resilient resistanceto excessive movement of the gangs is provided to prevent undue strainon the connecting parts. It is contemplated that various modificationsof the structure disclosed willv be possible within the scope of thefollowing claims.

`main frame loosely VWhat is claimed is:

l. in a disk harrow, the combination of a main frame, a disk gang frameunder the )ivoted at one end 0n the main frame for liorizontal angularadjustment, and a vertically yieldable connecting member mounted on oneof the frames at a point spaced radially from the pivot point andslidably engaging the other frame.

2. In a disk harrow, the combination of a main trame, a disk gang frameunder the main frame, a connection between the frames including meansfor allowing both horizontal and vertical angular movement between theframes, a guide member carried on the disk gang frame at a point spacedradially from said connection and having a slidable connection with themain frame, and vertically yieldable connecting means between the guidemember to the disk gang frame.

3. In a disk barrow, the combination of a main frame, a disk gang trameunder the main frame, a connection between the frames including meansfor allowing both horizontal and vertical angular movement between theframes, and a connecting plate yieldably mounted on the disk gang frameaway from said connection and having a portion overhanging and slidablymovable along a member of said main frame.

4. In a disk harrow, the combination of a main frame including anarcuate outer bar, a disk gang frame under the main frame having itsouter end extending beyond said arcuate bar, a connection between theinner end of the gang frame and the main frame including means forallowing both horizontal and vertical angular movement between theframes, a connecting plate on the gang frame adjacent said arcuate barhaving an upwardly offset portion overhanging said bar, an upright guidemember on the gang :trame engaging said plate, and a spring carried bythe guide member and engaging the upper side of the plate.

In testimony whereof I affix my signature.

WILLIAM C. DWYER.

